In 2014 construction began on the 960 kW Te Mana O Te Ra solar farm at Rarotonga International Airport.[8] The solar farm was commissioned in October 2014.[9] In September 2022 three battery-electric storage systems with a combined capacity of 13 MWh were installed on Rarotonga.[10]
The commissioning of these assets is part of the CookIslands Renewable Energy Project to reach its goal of delivering renewableenergy to all its islands and reducing the nation''s dependency on fossil fuelsby constructing solar-powered plants.
Designed to enable a reduction in the number of dieselgenerators operating, TAU''s BESS system will also provide grid stabilityfunctions such as frequency support and voltage support in the event of rapidchanges in solar PV output or faults in the network for the island''s power station.
Te Aponga Uira''s 6MW/3MW system uses Rolls RoyceSolutions MTU Energy Packs (Samsung batteries and Danfoss inverters), and the systemwill support the operation of the grid so it remains robust even withadditional high levels of renewable energy.
Installed by New Zealand-based company VectorPowersmart Ltd, the battery system was completed last month and the system was openedby the chairman of the TAU Board, Mata Nooroa, and Asian Development Bank (ADB)executive director, Arif Baharudin.
The Airport West BESS system is located on thenorthern side of the airport; the purpose of its design is to alleviateconstraint on new solar PV installations to the grid.
This BESS system sits adjacent to the existing 1MW PVplant to store all the PV plant output during the day for release in theevening, which will relieve pressure on the stability of the grid permittingcompletion of additional solar PV installations.
Funded by the Global Environment Fund (GEF), this componentwas completed in 2019 and formally opened by the Government''s financial secretaryGarth Henderson, and Baharudin.
It includes an integrated modular system, usablestorage capacity of 8 MWh, has the capability to charge and discharge at 2 MW,11 kV connection to the grid with full interface to the TAU SCADA system.
Completed in 2020, the system includes a Tesla PowerPack technology and controller, enabling it to respond almost instantaneouslyto commands from TAU, to store or release power to meet the demands of thenetwork installed by Vector Powersmart Ltd.
Numangatini Ariki Tangi Tereapii from the RenewableEnergy Development Division (REDD) of the Office of the Prime Minister (OPM) andBaharudin opened the Airport South system.
Expected to be in service for at least 10 - 15 years,this project includes the operations and maintenance of the system which willinvolve Vector Powersmart Limited, Tesla, Entura and TAU engineers workingcollaboratively and with comprehensive training in operation and maintenance ofthe system.
The project is delivered by the Project ManagementUnit (PMU) and Project Owners Engineers (Entura) under the REDD of the OPMworking closely with Te Aponga Uira and MFEM), in line with the implementation plan.
The financing of the Airport South BESS system andthe Power Station BESS system, was supported by the Green Climate Fund (GCF)and administered by the Asian Development Bank (ADB), through grant funding.
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